Environmental Genomics is a specialized book that focuses on predicting the genetic responses of organisms to changes in their environment. It integrates various disciplines such as molecular biology, physiology, toxicology, ecology, systems biology, epidemiology, and population genetics to provide a comprehensive understanding of genomic responses to environmental changes. The book serves as a handbook for environmental scientists who wish to utilize genomics to address environmental questions. It is divided into several sections that deal with profiling gene expression, detecting mutations across the genome and chromosomes, as well as methods for analyzing genetic diversity and polymorphisms in specific environments. The studies presented in this work aim to reduce uncertainties in environmental risk assessment and provide a systematic framework for determining environmental impacts, as well as ensuring human health and the sustainability of natural populations.